There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Can you solve below mathematical equation?

2^1234 - 2^1233

How many letters are in the alphabet?

In the image given, you can find several triangles. Can you count them all?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Solve below rebus puzzle?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

I have an apple tree , number of apple in this tree get doubles every week.

On 30th week , the tree gets completely filled with apples :-)



Can you tell me , on what week does my tree is half covered with apples ?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?